Once you have your bootable installer ready, it's time to move to the next step. Connect the USB flash drive to the computer you wish to install macOS. Choose 'Finder' then select. A macOS Catalina USB install drive is a great tool to have on hand to for quick and easy macOS 10.15 reinstalls. We show you how in this video tutorial. When finished, you will see the following Install macOS Catalina in your Applications folder. Format the USB Disk. Now insert your USB disk and then open Disk Utility. We are going to format our USB flash disk. Select your disk from the left panel and then click Erase. Give a name such as “usb” or anything.

Why do I need a bootable installer for macOS Catalina? There are a number of reasons for creating a bootable USB Mac installer. If you have more than one Mac, it allows you to install Catalina on all your other Macs without having to download it from the App Store each time.

After months of beta testing, Apple has rolled out macOS 10.15 Catalina to public users. You can download and install macOS Catalina if you have a compatible Mac. The macOS Catalina brings tons of new features such as the Apple Arcade, Screen Time, Voice Control, Sidecar, and Find My app. It has also replaced iTunes with three independent apps – Apple Music, Apple Podcasts, and Apple TV.

Is your Mac compatible with macOS Catalina?

Here’s the list of Mac devices compatible with the new software update:

• MacBook (Early 2015 or later)
• MacBook Air (Mid 2012 or later)
• MacBook Pro (Mid 2012 or later)
• Mac mini (Late 2012 or later)
• iMac (Late 2012 or later)
• iMac Pro (2017)
• Mac Pro (Late 2013 or later)

How to clean install the new software update

Upgrading to macOS 10.15 Catalina is pretty simple. Tap on the Apple icon in the top-left corner of the screen, then go to System Preferences > Software Update to download it. Alternatively, you can download it directly from the Mac App Store.

But sometimes upgrading macOS from the previous version to the latest one is not the best way. You might want to clean install macOS Catalina to give your Mac a fresh start without any issues from the previous installation. Here’s how to clean install macOS Catalina from USB drive:

Install Catalina From Bootable Usb Mac

Steps to install

Install Catalina From Bootable Usb Windows 7

• Take a full backup of all your important data. Save it to the cloud or an external drive
• You have to create a bootable USB drive. Here’s how you can create it. Make sure the USB drive is at least 8GB in size, and nothing else is stored on it
• Download the macOS Catalina installation file using this link
• Turn off the Mac and then insert the bootable USB drive
• Now turn the Mac back on while holding the Option key
• It will take you to the boot menu where you can select the USB drive. If your Mac has the T2 security chip, you have to first enable booting via external drives from macOS Recovery
• After a while, you’ll see the macOS Utilities menu on the screen. Select Disk Utility and then Continue
• Check to make sure you’ve selected the main drive of your Mac. Also ensure that the format is set as APFS or Mac OS Extended
• Now click Erase to wipe out the drive
• Once the drive has been erased, select Install macOS and then Continue. Just follow the on-screen prompts to clean install macOS Catalina

Install Catalina From Bootable Usb Download

Once you’ve successfully installed the new software, you can transfer all your data back from the cloud or external storage drive to the Mac. Also, head over to the Mac App Store and re-install all the apps you want.